Hi developer please i like your game but after reskin it and upload it in my google play account i get an alert about google play services can u give me a solution.and they said that i have to contact the developer.thks

What we can see is that Play Game Service is not correct implement, which can be several reasons.
Did you add Play Game Service to your App?
Did you create Game Service for your App?
Did you publish Play Game Service For your App?

hi, i didin’t make any change; i just took your code and reskin it by changing graphics package name, ads , and name and after export file to APK i uploaded it in my google play account but after accepting my game i got an alerte from google ..thnks.

Hi,
Thats mean that you did not correctly implement Achievement in Play Game Services.
Please check again all fields added, images, description. Something you have edit same or very similar to others. All fields for Achievement need to be different.

Our support is for game to run smoothly, but on your side is how to add all info fields in Play Console.